Dormer Pramet A110 9/64 Inch HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

The Dormer Pramet A110 9/64 Inch HSS ST Straight Shank Long Series Drill, DIN 340, is a purpose-built tool for precise, reliable rotation of metalwork deep into hard surfaces. Engineered for durability and accuracy, this drill bit blends a robust point geometry with a long reach to tackle deeper holes without sacrificing hole quality.

Key features that matter in real-world shop setups

• 118-degree conventional point delivers a strong, self-centering entry that minimizes wandering and yields clean, round holes. The geometry is easy to re-grind, so you can maintain sharpness with minimal downtime.
• Steam oxide finish reduces friction and minimizes workpiece material from sticking to the cutting edge, promoting smoother drilling and better chip flow.
• Long length series designed for deeper holes and applications where extended reach is essential—ideal for pocketing, chassis work, or any task requiring more clearance between the drill and the workpiece.
• Premium HSS material provides solid performance across a range of metals, including steel, aluminum, and stainless steel, offering a reliable balance of hardness and toughness for repeated use.
• Straight shank (ST) format compatible with a wide variety of machine spindles and handheld drills, making it a versatile choice for both shop and field work.
• DIN 340 specification ensures consistent sizing and fitment in standard chucks and holders, reducing runout and improving hole accuracy.

Ideal use cases

• Deep-hole drilling in steel and aluminum where standard-length bits fall short—perfect for chassis fabrication, tool mounts, and mounting holes in metal enclosures.
• Small-diameter precision holes (9/64") in mild to alloy steels where clean edges and consistent hole diameter are critical.
• Hand-held drilling or machine drilling setups that demand a dependable, long-reach drill bit with straightforward toolholding.

Why this drill stands out

• It pairs a robust cutting point with a finish that keeps chips moving and edges sharp longer, reducing maintenance time and tool downtime.
• The long-series design opens up possibilities for workpieces with limited access, such as interior panels, assembly corners, and recessed features.
• Versatility across ferrous and non-ferrous materials makes it a practical addition to any machinist’s or fabricator’s kit, eliminating the need for multiple specialized bits for common tasks.

Practical tips to maximize performance:

• Use appropriate cutting fluid or light lubrication when drilling steels to extend edge life and improve finish.
• Start with a light pecking feed to prevent deflection on thin materials, then increase depth as the bit begins to cut reliably.
• Maintain a steady drilling speed and avoid excessive pressure—allow the 118-degree point to do the guiding, while the sharp edge does the cutting.

The Dormer Pramet A110 9/64 Inch HSS ST Straight Shank Long Series Drill is a dependable, all-purpose choice for metalworking tasks that demand depth, precision, and endurance. It’s built to perform in both handheld and machine-drilled applications, delivering consistent holes you can trust in demanding environments.